My answer would be almost everything, here's a couple that I REALLY would like to have included in the statistics-ledger (there's one coming, right ?):
Numbers of Panzers/Ships/Planes produced/lost, preferably represented by strength-points, so that when you reinforce a unit by 25 strength points, that 25 makes it into the statistics.
Also, preferably split up according to models (i.e. Bf109e, Bf109k etc) so that one can see the most produced model of the conflict and such.
Also I would like to have information on the number of confirmed damage (strength points) done to the enemy, per nation
Number of battles won/lost, i.e. measured in provinces, air/naval engagements against each nation.
Number of ICs lost due to strat-bombing in a given period of time
Number of convoy-transports (BRTs) sunk by enemy/own shipping/airforce
Number of units out of supply, over a period of time
Total production of resources
Total conversion of resources
etc.
Numbers of Panzers/Ships/Planes produced/lost, preferably represented by strength-points, so that when you reinforce a unit by 25 strength points, that 25 makes it into the statistics.
Also, preferably split up according to models (i.e. Bf109e, Bf109k etc) so that one can see the most produced model of the conflict and such.
Also I would like to have information on the number of confirmed damage (strength points) done to the enemy, per nation
Number of battles won/lost, i.e. measured in provinces, air/naval engagements against each nation.
Number of ICs lost due to strat-bombing in a given period of time
Number of convoy-transports (BRTs) sunk by enemy/own shipping/airforce
Number of units out of supply, over a period of time
Total production of resources
Total conversion of resources
etc.